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JBL 2446H Driver 4In Titanium Diaph-8 Ohms

JBL 2446H Compression Driver 4" Titanium Diaph-8 Ohms

The model 2446H/J is a professional
quality high-frequency compression
driver that incorporates JBL’s newly developed Coherent Wave phasing
plug as well as a pure titanium diaphragm with radial ribs and patented
three-dimensional diamond pattern
suspension.

The Coherent Wave phasing plug
assembly consists of four die-cast
annular aperture structures of constant path length to provide m-phase
combining of diaphragm output at the
driver’s exit. This optimized configuration allows coherent summation of
acoustical power up to much higher
frequencies than afforded by earlier
designs.

The diaphragm design includes
JBL’s exclusive three-dimensional
diamond pattern surround1 which
reduces membrane stresses in the
diaphragm support structure and
extends diaphragm life. The depth of
the diamond pattern is closely controlled during the manufacturing
process to provide predictable frequencies for the 2nd and 3rd normal
resonance modes and for the basic
suspension resonance mode. The
diaphragm also incorporates a series
of embossed radial reinforcing ribs
that increase diaphragm stiffness. This
diaphragm, when combined with
the Coherent Wave phasing plug,
increases the 2446H/J’s output in
the 5 kHz to 20 kHz range.

High temperature voice coil former materials and adhesives enable the 2446H/J to handle extremely high power
levels over extended periods of time. The voice coils
themselves are identical to previous JBL models, so that
impedance and network matching will be the same. After
manufacture, the frequency response of each driver is
tested for conformity to JBL’s rigid performance standards.
The model 2446H/J is ruggedly constructed to withstand
the rigors of both fixed and transportable commercial
applications. All cast parts and machined tolerances are
held to the same levels traditionally associated with JBL
designs. The JBL manufacturing process also permits the
use of rim centered rather than pin mounted diaphragms,
for instant interchangeability and ease of field service.